title: Secondary and tertiary transfer of vaccinia virus among U.S. military personnel--United States and worldwide, 2002-2004.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D017589:Immunization Programs; D007223:Infant; D008297:Male; D008875:Middle Aged; D008889:Military Personnel; D012900:Smallpox Vaccine / Q000009:adverse effects*; D014481:United States / Q000453:epidemiology; D014615:Vaccinia / Q000453:epidemiology / Q000517:prevention & control / Q000635:transmission*
chemical_list: D012900:Smallpox Vaccine